Advertisement

Research on Chemical Intermediates

, Volume 29, Issue 1, pp 63–70 | Cite as

A dispersive model of radical accumulation in irradiated solids

  • Andrzej Plonka
  • Justyna Staluszka
  • Ewa Szajdzinska-Pietek
  • Ingrid Kohl
  • Andreas Hallbrucker
  • Erwin Mayer
Article
  • 24 Downloads

Abstract

- A dispersive model of radical accumulation in irradiated solids is discussed by the example of hexagonal ice (Ih) and cubic ice (Ic) obtained by annealing of hyperquenched glassy water at 160 K. The model assumes that radical production upon γ-irradiation is accompanied by their second-order decay, which proceeds according to dispersive kinetics with the time-dependent specific reaction rate k(t) = Btα-1, where B = constant and α is the dispersion parameter equal to 0.40 for both the hexagonal and cubic ices. The radicals, OH in Ih, and OH plus HO2 in Ic are produced at the same rate upon γ-irradiation. The observed enhancement of radical accumulation in ice Ic in comparison with Ih is due to the marked decrease of radical recombination in ice Ic. This is rationalized by the hindrance of radical transport in the lattice of ice Ic containing substantial amounts of Bjerrum-type L-defects.

IRRADIATED SOLIDS HEXAGONAL ICE CUBIC ICE HYPERQUENCHED GLASSY WATER RADICALS 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

REFERENCES

  1. 1.
    J. Bednarek, A. Plonka, A. Hallbrucker, E. Mayer and M. C. R. Symons, J. Am. Chem. Soc. 118, 9387 (1996).Google Scholar
  2. 2.
    J. Bednarek, A. Plonka, A. Hallbrucker and E. Mayer, Radiat. Phys. Chem. 53, 635 (1998).Google Scholar
  3. 3.
    J. Bednarek, A. Plonka, A. Hallbrucker and E. Mayer, J. Phys. Chem. A 102, 9091 (1998).Google Scholar
  4. 4.
    J. Bednarek, A. Plonka, A. Hallbrucker and E. Mayer, Radiat. Phys. Chem. 55, 477 (1999).Google Scholar
  5. 5.
    J. Bednarek, A. Plonka, A. Hallbrucker and E. Mayer, J. Phys. Chem. A 103, 6824 (1999).Google Scholar
  6. 6.
    A. Plonka, E. Szajdzinska-Pietek, J. Bednarek, A. Hallbrucker and E. Mayer, Phys. Chem. Chem. Phys. 2, 1587 (2000).Google Scholar
  7. 7.
    R. E. Johnson and T. I. Quickenden, J. Geophys. Res. 102, 10985 (1997).Google Scholar
  8. 8.
    J. P. Devlin, Int. Rev. Phys. Chem. 9, 29 (1990).Google Scholar
  9. 9.
    L. Kevan, in: Radiation Chemistry of Aqueous Systems, G. Stein (Ed.), pp. 21–71. The Weizmann Science Press of Israel, Jerusalem(1968).Google Scholar
  10. 10.
    S. Siegel, L. H. Baum, S. Skolnik and J. M. Fluornoy, J. Chem. Phys. 32, 1249 (1960).Google Scholar
  11. 11.
    S. Siegel, L. H. Baum, S. Skolnik and J. M. Fluornoy, J. Chem. Phys. 34, 339 (1961).Google Scholar
  12. 12.
    S. Siegel, J. M. Fluornoy and L. H. Baum, J. Chem. Phys. 34, 1782 (1961).Google Scholar
  13. 13.
    S. A. Puntezhis, B. G. Ershov and A. K. Pikaev, Dolk. Akad. Nauk SSSR 196, 641 (1971).Google Scholar
  14. 14.
    E. Mayer, J. Appl. Phys. 58, 663 (1985).Google Scholar
  15. 15.
    E. Mayer, J. Microsc. 140, 3 (1985).Google Scholar
  16. 16.
    E. Mayer, Cryoletters 9, 66 (1988).Google Scholar
  17. 17.
    E. Mayer, in: Hydrogen Bond Networks, M.-C. Bellissent-Funel and J. C. Dore (Eds), pp. 355–372. Kluwer Academic Publishers, Dordrecht (1994).Google Scholar
  18. 18.
    T. E. Gunter, J. Phys. Chem. 46, 3818 (1967).Google Scholar
  19. 19.
    J. Kroh, B. C. Green and J. W. T. Spinks, Can. J. Chem. 40, 413 (1962).Google Scholar
  20. 20.
    B. G. Esrhov, A. K. Pikaev, P. Y. Glazunov and V. I. Spitsyn, Izv. Akad. Nauk SSSR, Ser. Khim. 1755 (1964).Google Scholar
  21. 21.
    G. H. Dibdin, Trans. Faraday Soc. 63, 2098. (1967).Google Scholar
  22. 22.
    J. Bednarek and A. Plonka, J. Chem. Soc., Faraday Trans. 1 83, 3725, 3737 (1987).Google Scholar
  23. 23.
    A. Plonka, E. Szajdzinska-Pietekand J. Kroh, Radiat. Phys. Chem. 23, 583 (1984).Google Scholar
  24. 24.
    A. Plonka, Dispersive Kinetics. Kluwer Academic Publishers, Dordrecht (2001) and references therein.Google Scholar
  25. 25.
    G. P. Johari and S. J. Jones, J. Chem. Phys. 62, 4213 (1975).Google Scholar

Copyright information

© VSP 2003 2003

Authors and Affiliations

  • Andrzej Plonka
  • Justyna Staluszka
  • Ewa Szajdzinska-Pietek
  • Ingrid Kohl
  • Andreas Hallbrucker
  • Erwin Mayer

There are no affiliations available

Personalised recommendations